Carbureter.



No 774,486. PATENTBD NOV. 8, 1004.

H. MARSHALL.

GARBURETER.

APPLICATION FILED JULY 29, 1903.

NO MODEL,

Patented November 8, 1904.

PATENT OFFICE.

HUGH MARSHALL, OF EDINBURGH, SCOTLAND.

CARBURETER.

SPECIFICATION forming part of Letters Patent No. 774,486, dated November8, 1904.

Original application filed August 2,1902, Serial No. 118,106. Dividedand this application filed July 29, 1903. Serial No. 167,436.

(No model.)

To all whom, it may concern:

Be it known that I, HUGH MARsHALL, doctor of science, a subject of theKing of the United Kingdom of Great Britain and Ireland, residing at 12Lonsdale Terrace, Edinburgh, in the county of Mid-Lothian, Scotland,have invented a new and useful Improvement in Carbureters, of which thefollowing is a specification.

This invention is a division of that originally described and claimed inmy application, Serial No. 118, 106,filedAugust 2, 1902,and relates toan integral absorbent block for absorbing volatile hydrocarbon or otherliquid for use in apparatus for carbureting air or gas for lighting,heating, or motive power.

The integral absorbent block is made of plaster-of-paris and othermaterials and is formed with a number of channels or perforationsthrough it. Air passing through these perforations takes up the volatilehydrocarbon from the block in the state of vapor.

Figure l is a section or form of absorbent block and containerconstructed in accordance with my invention. Fig. 2 is a plan of theabsorbent block only.

1 construct the absorbent block A with the longitudinal perforations a.The said block is contained within a metal case B and held in place bythe end plates thereof, the block and case being preferably cylindrical;but integral absorbent blocks of any shape may be employed. A clear freespace Z) 6 is left at top and bottom of the case, respectively. A tubeC, connected by a hollow plug 0, leads air into a pipe or passage (0,formed in the center of the perforated block for the purpose of leadingthe air into'the upper space 6 at the top of the perforated block. Theair, heai y with absorption of the volatile hydrocarbon with which theblock is saturated, descends through the perforations a into the lowerspace I) to the port D, thence to the burner, or the air may be admittedby a separate opening at the top of the case B.

I have found from experiments that the following composition for theperforated block gives good results: two parts, by Weight, ofplaster-of-paris; one part,by weight,of kieselguhr, (infusorial earth;)five parts, by weight, of Water, mixed into a paste and molded or castinto blocks with the channels or perforations a, the blocks being thenair dried after the paste has set.

The part broken off at b is the supporting connection to the lamp orapparatus and has a reduced end d, through which the air-inlet tube Cand outlet-port D extend, receiving the socket or neck d of the case B.

The channels or perforations a may be made through the block byproviding the moldingbox with upright wires or rods, which when thepaste is set and the block is drawn out of the molding-box leaves thechannels or perforations through the block.

I claim A carburetor comprising a case having a.

bottom space of the case and fitting into the socket of the latter, andan air-inlet tube extending through the lamp connection and connectedwith the hollow plug.

HUGH MARSHALL. [L. s]

Witnesses:

JOHN MCLAREN, GEORGE SHAW MGORINDLE.

